23 lines
391 B
C
23 lines
391 B
C
|
/*
|
|||
|
|
* eth_ip_checksum.c
|
|||
|
|
*
|
|||
|
|
* Created on: 14 <EFBFBD><EFBFBD><EFBFBD>. 2023 <EFBFBD>.
|
|||
|
|
* Author: sychev
|
|||
|
|
*/
|
|||
|
|
#include "eth_ip_checksum.h"
|
|||
|
|
#include "base/swap.h"
|
|||
|
|
|
|||
|
|
uint16_t eth_ip_calcChecksum(uint16_t * const data, uint32_t length)
|
|||
|
|
{
|
|||
|
|
uint32_t i, crc = 0;
|
|||
|
|
|
|||
|
|
for (i = 0 ; i < length; ++i ) {
|
|||
|
|
crc += BASE_SWAP16(data[i]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
crc = (crc & 0xffff) + (crc >> 16);
|
|||
|
|
|
|||
|
|
return (uint16_t) (~crc);
|
|||
|
|
}
|
|||
|
|
|